//添加下载记录
private void AddDownRecord(string TaskName, string downLoadUrl, string savePath, int pageCount, int progress, int finished)
{
SqlOperate operate = new SqlOperate();
operate.CreateOrOpenDataBase("task.db");
operate.InsertData("task", TaskName, downLoadUrl, savePath, pageCount, progress, finished);
operate.CloseDataBase();
}